Use of otolith microchemistry to estimate the migratory history of Japanese dace Tribolodon hakonensis in the Kamo River, Mie Prefecture

DOI JASI Web Site 7 Citations 21 References

Bibliographic Information

Other Title
  • 耳石微量元素分析を用いた三重県加茂川におけるウグイの回遊履歴の推定
  • ジセキ ビリョウ ゲンソ ブンセキ オ モチイタ ミエケン カモガワ ニ オケル ウグイ ノ カイユウ リレキ ノ スイテイ

Search this article

Abstract

  The diadromous migratory history of Japanese dace Tribolodon hakonensis in the Kamo River, Mie Prefecture, was studied by examining the concentrations of strontium (Sr) and calcium (Ca) in their otoliths (lapillus) using wavelength dispersive X-ray spectrometry on an electron microprobe. In the rearing examination, individuals which were collected in freshwater and acclimated to a seawater environment (20-37‰) showed a Sr:Ca ratio increase in the otolith. The relationship between otolith radius and standard length of Japanese dace fitted well to the logistic regression model. These results indicate that otolith microchemistry analysis is effective for clarifying the migratory history of Japanese dace. This analysis showed that 93 of 94 specimens collected from spawning aggregations in the Kamo River, had seawater-dwelling experience. In those specimens, the standard length at seaward migration was back-calculated as 18-152 mm except for two specimens. The seaward migration age corresponded to age 0 to 1 from the age and standard length distribution of Japanese dace in the Kamo River.<br>

Journal

Citations (7)*help

See more

References(21)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top